Rain sensor changes id every day

[roseen]

Hi all,

I am unsure if this belongs here or under hardware, RFXComm. I'll starthere.

I have a PCR800 rain sensor, connected to a Raspberry Pi Domoticz using an RFXTrx433. It has been working fine for a year or so.

Then it disappeared, and I figured it was the battery so I changed it. At first, a fresh battery didn't help, but after a couple of weeks when I changed to a different brand of battery, it came online again.
I wasn't surprised to see that it was using a new Id, I simply added it and merged it with the old sensor.

But then after a couple of days, it was gone again. And when I checked "devices" I found it using a new Id!
I added it, merged, and kept a closer look. This time it took only 24 hours before it changed it's address again.

Does anyone have any idea what is causing this?

Attached: Devices tab, showing a single device using 21 different Id's during a month.

Spoiler: show

[Gravityz]

could it be that this device is drawing to much current?
if the voltage drops it might get a new device because of that (eg the same if you replace batteries)

if would look inside the device for possible shortage/leakage.

these units should work fine on 2x AA(but use good ones, no cheap alkaline.

if you use recargable NIMH it might last longer because those can handle more current.